Armrest assembly, wheelchair framework and wheelchair

Abstract

The invention provides an armrest assembly, a wheelchair framework and a wheelchair, the armrest assembly comprises an armrest rod and a first connecting rod, the first end of the first connecting rod is hinged to a backrest rod, and the second end of the first connecting rod is hinged to the first end of the armrest rod; the armrest assembly has an unfolded state and a folded state which are opposite; in the unfolded state, the armrest rod is horizontally arranged, and the first end of the first connecting rod is located on the side, facing the seat rod, of the armrest rod. When the armrest assembly is converted from the unfolding state to the folding state, the first end of the first connecting rod rotates towards one side of the seat rod around the hinge point of the first connecting rod and the backrest rod, and the armrest rod rotates towards one side of the first connecting rod around the hinge point of the armrest rod and the first connecting rod. When the armrest rod is folded, the first connecting rod firstly drives the armrest rod to rotate towards one side of the seat rod, and the overlapping size of the armrest rod and the backrest rod is increased, so that the folded armrest rod is not prone to exceeding the range of the backrest rod, and the size of the folded wheelchair is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of medical devices, and in particular to an armrest assembly, a wheelchair frame and a wheelchair. Background Art

[0002] A wheelchair is a chair with wheels that can help replace walking. It is an important means of transportation for special groups of people (such as the injured, the sick, and the disabled) to recover at home, to transport around, to see a doctor, and to go out for activities. Wheelchairs not only meet the transportation needs of special groups of people, allowing them to exercise and participate in social activities with the help of wheelchairs, but also make it easier for family members to move and take care of special groups of people.

[0003] Although wheelchairs provide convenience for users to carry out medium and long-distance activities, they take up a lot of space when stored. In order to solve the above problems, the solution of the related art provides a foldable wheelchair. After folding, the volume of the wheelchair is reduced, thereby solving the problem of large storage space, and facilitating the user or caregiver to carry and transport the wheelchair. In addition, the related art also hinges the armrest rod and the backrest rod. When folding, the armrest rod is rotated toward the side of the backrest rod, and then the backrest rod and the armrest rod are folded and rotated toward the side of the seat as a whole, thereby avoiding interference between the armrest rod and the ground after the wheelchair is folded.

[0004] However, the handrails in the related art will partially extend beyond the backrest rod after being folded, thereby increasing the volume of the wheelchair after being folded. Summary of the invention

[0005] In order to overcome the above-mentioned defects of the related art, the purpose of the present application is to provide an armrest assembly, a wheelchair frame and a wheelchair, which can increase the overlapping size of the armrest rod and the backrest rod after folding, thereby facilitating reducing the volume of the wheelchair after folding.

[0006] On the one hand, the present application provides an armrest assembly, which is used to be arranged on a wheelchair frame and hinged to a backrest rod, comprising an armrest rod and a first connecting rod, wherein a first end of the first connecting rod is hinged to the backrest rod, and a second end of the first connecting rod is hinged to the first end of the armrest rod;

[0007] The armrest assembly has a relative unfolded state and a folded state; in the unfolded state, the armrest rod is horizontally arranged, and the first end of the first connecting rod is located on the side of the armrest rod facing the seat rod; when the armrest assembly is converted from the unfolded state to the folded state, the first end of the first connecting rod rotates toward the side of the seat around the hinge point between the first connecting rod and the backrest rod, and the armrest rod rotates toward the side of the first connecting rod around the hinge point between the armrest rod and the first connecting rod.

[0008] In a possible implementation, a first mounting portion is provided in the middle of the backrest rod, and a first pin passes through the first end of the first connecting rod and the first mounting portion in sequence to hinge the first connecting rod to the backrest rod;

[0009] The second pin shaft passes through the second end of the first connecting rod and the first end of the handrail rod in sequence to hinge the first connecting rod to the handrail rod.

[0010] In a possible implementation, a limiting device is further provided on the backrest rod, and in the unfolded state, the first connecting rod abuts against the limiting device.

[0011] In a possible implementation, the limiting device includes a first baffle and a second baffle, the first end of the first baffle is fixedly connected to the backrest rod, the second end of the first baffle is fixedly connected to the first end of the second baffle, and the first baffle, the second baffle and the backrest rod jointly define a limiting groove for accommodating the first connecting rod.

[0012] In a possible implementation, the second baffle is perpendicular to the first baffle; and the first baffle and the second baffle are integrally formed.

[0013] In a possible implementation, it also includes a second connecting rod, the first end of the second connecting rod is hinged to the second end of the armrest rod, and the second end of the second connecting rod is hinged to the first end of the backrest rod; when the armrest assembly is converted from the unfolded state to the folded state, the second connecting rod rotates toward the side of the backrest rod around the hinge point between the second connecting rod and the backrest rod.

[0014] In a possible implementation, the second end of the handrail rod is provided with a second mounting portion, and a third pin shaft sequentially passes through the second end of the handrail rod and the first end of the second connecting rod to hinge the second connecting rod to the handrail rod;

[0015] The fourth pin shaft passes through the second end of the second connecting rod and the first end of the backrest rod in sequence to hinge the second connecting rod to the backrest rod.

[0016] In a possible implementation, a remote control mounting portion is further provided at the second end of the handrail, and a remote control device is detachably connected to the remote control mounting portion.

[0017] On the other hand, the present application provides a wheelchair frame, comprising an armrest assembly as described above; the wheelchair frame further comprises a backrest rod, a seat rod, a front support rod and a rear support rod; the first end of the seat rod is hinged to the backrest rod, the second end of the seat rod is hinged to the first end of the front support rod, the second end of the front support rod is used to connect to the front wheel, the first end of the rear support rod is hinged to the first end of the backrest rod, and the second end of the rear support rod is used to connect to the rear wheel;

[0018] The wheelchair frame has a relative unfolded state and a folded state. In the unfolded state, the seat rod is horizontally arranged, the backrest rod, the front support rod and the rear support rod are all inclined to the seat rod, and the backrest rod and the front support rod and the rear support rod are respectively located on both sides of the seat rod; when the wheelchair frame is converted from the unfolded state to the folded state, the backrest rod is folded toward the second end of the seat rod around the hinge point between the backrest rod and the seat rod; the rear support rod and the rear wheel are folded toward the second end of the seat rod around the hinge point between the rear support rod and the backrest rod; the front support rod and the front wheel are folded toward the first end of the seat rod around the hinge point between the front support rod and the seat rod.

[0019] On the other hand, the present application provides a wheelchair comprising the wheelchair frame as described above.

[0020] The present application provides an armrest assembly, a wheelchair frame and a wheelchair, wherein the armrest assembly comprises an armrest rod and a first connecting rod, wherein the first end of the first connecting rod is hinged to the backrest rod, and the second end of the first connecting rod is hinged to the first end of the armrest rod; the armrest assembly has a relative unfolded state and a folded state; in the unfolded state, the armrest rod is horizontally arranged, and the first end of the first connecting rod is located on the side of the armrest rod facing the seat rod; when the armrest assembly is converted from the unfolded state to the folded state, the first end of the first connecting rod rotates toward the side of the seat rod around the hinge point between the first connecting rod and the backrest rod, and the armrest rod rotates toward the side of the first connecting rod around the hinge point between the armrest rod and the first connecting rod. The present application hinges the first connecting rod between the armrest rod and the backrest rod. When the armrest rod is folded, the first connecting rod first drives the armrest rod to rotate toward the seat rod side, and then the armrest rod rotates toward the first connecting rod side. After folding, the armrest rod, the first connecting rod and the backrest rod are roughly parallel. The first connecting rod drives the armrest rod to rotate, thereby increasing the overlapping size of the armrest rod and the backrest rod, so that the armrest rod is not easy to exceed the range of the backrest rod after folding, which is beneficial to reducing the volume of the wheelchair after folding. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the related technologies, the following is a brief introduction to the drawings required for use in the embodiments or the related technical descriptions. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1(a)-Figure 1(d) A simplified structural diagram of a wheelchair in different states provided by an embodiment of the present application;

[0023] Figure 2(a)-Figure 2(d) This is a schematic diagram of the structure of a wheelchair frame in different states provided by an embodiment of the present application.

[0024] Reference numerals:

[0025] 100-backrest rod; 110-backrest rod body; 120-backrest rod connecting section; 130-first mounting portion;

[0026] 200-seat rod; 210-seat rod body; 220-seat rod connecting section;

[0027] 300-front support rod; 310-front support rod body; 320-front support rod connecting section;

[0028] 400-rear support rod; 410-rear support rod body; 420-rear support rod connecting section; 430-protrusion;

[0029] 500-front wheel;

[0030] 600-rear wheel;

[0031] 700-connecting rod;

[0032] 800-main support rod;

[0033] 900-foot pedal; 910-first connecting rod; 920-second connecting rod;

[0034] 1000-handrail assembly; 1100-handrail rod; 1110-second mounting portion; 1120-remote control mounting portion; 1200-first connecting rod; 1300-limiting device; 1310-first baffle; 1320-second baffle; 1400-second connecting rod;

[0035] 2000- Remote control device;

[0036] X-first direction; Y-second direction; Z-third direction. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments.

[0038] Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0039] As described in the background art, the handrail rod in the related art will partially extend beyond the backrest rod after being folded, thereby increasing the volume of the wheelchair after being folded.

[0040] In view of this, the embodiments of the present application aim to provide an armrest assembly, a wheelchair frame and a wheelchair, by arranging a first connecting rod between the armrest rod and the backrest rod, the first end of the first connecting rod is hinged to the backrest rod, and the second end of the first connecting rod is hinged to the first end of the armrest rod; in the unfolded state, the first connecting rod is located on the side of the armrest rod facing the seat rod; when the armrest rod is folded, the first connecting rod first drives the armrest rod to rotate toward the side of the seat rod, and then the armrest rod rotates toward the side of the first connecting rod, and after folding, the armrest rod, the first connecting rod and the backrest rod are roughly parallel; the first connecting rod drives the armrest rod to rotate, which increases the overlapping size of the armrest rod and the backrest rod, so that the armrest rod is not easy to exceed the range of the backrest rod after folding, which is beneficial to reducing the volume of the wheelchair after folding.

[0041] The contents of the embodiments of the present application will be described in detail below in conjunction with the accompanying drawings so that those skilled in the art can understand the contents of the present application in more detail. It should be noted that in the present embodiment, the first direction X, the second direction Y and the third direction Z are three different directions that are perpendicular to each other in a three-dimensional space, wherein the second direction Y can be, for example, the height direction (vertical direction) when the wheelchair is in use, and the third direction Z can be, for example, the width direction when the wheelchair is in use.

[0042] Figure 1(a)-Figure 1(d) This is a simplified structural diagram of a wheelchair in different states provided by an embodiment of the present application.

[0043] Please refer to Figure 1(a)-Figure 1(d) The present embodiment provides a wheelchair, comprising a wheelchair frame, the wheelchair frame comprising two backrest rods 100, two seat rods 200, two front support rods 300 and two rear support rods 400 arranged opposite to each other along a third direction Z, the lower end of the front support rod 300 is provided with a front wheel 500, and the lower end of the rear support rod 400 is provided with a rear wheel 600. The backrest rod 100, the seat rod 200, the front support rod 300 and the rear support rod 400 located on the same side are hinged to each other so that the wheelchair frame can be folded.

[0044] The wheelchair frame also includes two armrest assemblies 1000 arranged relatively to each other along a third direction Z. The two armrest assemblies 1000 are respectively hinged to the corresponding backrest rods 100. When the wheelchair is folded, the armrest assembly 1000 is first rotated toward the backrest rod 100, and then the backrest rod 100 and the armrest assembly 1000 are folded and rotated as a whole toward the seat rod 200, thereby avoiding interference between the armrest assembly 1000 and the ground after the wheelchair is folded.

[0045] Further, the armrest assembly 1000 of the present embodiment includes an armrest rod 1100 and a first connecting rod 1200, wherein the first end of the first connecting rod 1200 is hinged to the backrest rod 100, and the second end of the first connecting rod 1200 is hinged to the first end of the armrest rod 1100. In the present embodiment, the specific hinge structure between the above-mentioned rods can be set as needed, and the present embodiment does not limit this. Since the rods are hingedly connected, the armrest assembly 1000 of the present embodiment can be folded, so that the armrest assembly 1000 has a relative unfolded state and a folded state.

[0046] As shown in FIG. 1( a ), in the unfolded state, the handrail 1100 is arranged horizontally (along the first direction X), so that the user can place his hands on the handrail 1100 to improve the riding comfort. The first end of the first connecting rod 1200 is located on the side of the handrail 1100 facing the seat rod 200 .

[0047] When the armrest assembly 1000 is converted from the unfolded state to the folded state, as shown in Figure 1(b), the first end of the first link 1200 rotates toward the seat rod 200 around the hinge point between the first link 1200 and the backrest rod 100, and the armrest rod 1100 rotates toward the first link 1200 around the hinge point between the armrest rod 1100 and the first link 1200, and finally folds into the state shown in Figure 1(c), where the armrest rod 1100, the first link 1200 and the backrest rod 100 are substantially parallel. It can be understood from FIG. 1(b) and FIG. 1(c) that when the armrest assembly 1000 is folded, the armrest rod 1100 first moves along the first direction X through the backrest rod 100 toward the side away from the seat rod 200 under the drive of the first connecting rod 1200, and at the same time moves along the second direction Y toward the seat rod 200 under the drive of the first connecting rod 1200, thereby increasing the overlapping size of the armrest rod 1100 and the backrest rod 100, so that the armrest rod 1100 is not easy to exceed the range of the backrest rod 100 after folding. As shown in FIG. 1(d), after the wheelchair frame is folded, the armrest rod 1100 is completely located within the length range of the backrest rod 100 in the first direction X, which is conducive to reducing the volume of the wheelchair after folding.

[0048] As shown in FIG. 1( b ), in a possible implementation manner, the rods of this embodiment may be hinged by parts such as pins.

[0049] Specifically, a first mounting portion 130 is provided in the middle portion of the backrest rod 100 of the present embodiment. The first mounting portion 130 can be arranged, for example, on the side of the backrest rod 100 facing the seat rod 200. The first mounting portion 130 is provided with a through hole passing through it along the third direction Z. A corresponding through hole is also provided on the first end of the first connecting rod 1200. The first pin shaft passes through the first end of the first connecting rod 1200 and the first mounting portion 130 in sequence to hinge the first connecting rod 1200 to the backrest rod 100.

[0050] The second end of the first connecting rod 1200 and the first end of the handrail rod 1100 are also provided with through holes that cooperate with each other, and the second pin shaft passes through the second end of the first connecting rod 1200 and the first end of the handrail rod 1100 in sequence to hinge the first connecting rod 1200 with the handrail rod 1100.

[0051] Please continue to refer to Figure 1(a)-Figure 1(c) In order to limit the rotation range of the first connecting rod 1200 in the counterclockwise direction and ensure that the armrest rod 1100 can be used normally, a limiting device 1300 is also provided on the backrest rod 100 of this embodiment. When the armrest assembly 1000 is unfolded, the first connecting rod 1200 abuts against the limiting device 1300.

[0052] Specifically, the limiting device 1300 includes a first baffle 1310 and a second baffle 1320. As shown in FIG1(b), the first end of the first baffle 1310 is fixedly connected to the backrest rod 100. For example, the first baffle 1310 can be arranged parallel to the third direction Z on the surface of the backrest rod 100 facing the seat rod 200. The first baffle 1310 and the backrest rod 100 can be connected by welding or by fasteners such as screws. The second end of the first baffle 1310 is fixedly connected to the first end of the second baffle 1320. For example, the second baffle 1320 can be arranged parallel to the first direction X at the end of the first baffle 1310 away from the backrest rod 100. The first baffle 1310 and the second baffle 1320 can also be connected by welding or by fasteners such as screws. The first baffle 1310, the second baffle 1320 and the backrest rod 100 jointly define a limiting groove for accommodating the first connecting rod 1200. When the armrest assembly 1000 is unfolded, the first connecting rod 1200 rotates counterclockwise into the limiting groove and is blocked by the first baffle 1310, thereby limiting its continued rotation; the second baffle 1320 can prevent the first connecting rod 1200 from falling off from the limiting groove.

[0053] Furthermore, in this embodiment, the second baffle 1320 can be arranged perpendicular to the first baffle 1310. The first baffle 1310 and the second baffle 1320 can be formed in an integral manner, for example, a flat plate can be made into the first baffle 1310 and the second baffle 1320 by bending or stamping.

[0054] Please continue to refer to Figure 1(a)-Figure 1(c) In order to ensure the stability of the handrail rod 1100 when in use, the handrail assembly 1000 of the present embodiment further includes a second connecting rod 1400, the first end of the second connecting rod 1400 is hinged to the second end of the handrail rod 1100, and the second end of the second connecting rod 1400 is hinged to the first end of the backrest rod 100. When the handrail assembly 1000 is in the unfolded state, the first connecting rod 1200 and the second connecting rod 1400 provide support for the first end and the second end of the handrail rod 1100 respectively, and because of the limitation of the limiting device 1300, the handrail rod 1100 can be kept in a horizontal state. When the handrail assembly 1000 is converted from the unfolded state to the folded state, the second connecting rod 1400 rotates to one side of the backrest rod 100 around the hinge point between the second connecting rod 1400 and the backrest rod 100, and the second connecting rod 1400 is also substantially parallel to the backrest rod 100 after folding and storage.

[0055] In this embodiment, the second connecting rod 1400 and the adjacent rod member can also be hinged by parts such as a pin.

[0056] Specifically, the second end of the armrest rod 1100 is provided with a second mounting portion 1110, and the second mounting portion 1110 can be set on the side of the armrest rod 1100 facing the seat rod 200. The second mounting portion 1110 is provided with a through hole passing through it along the third direction Z, and the first end of the second connecting rod 1400 is also provided with a corresponding through hole. The third pin shaft passes through the second end of the armrest rod 1100 and the first end of the second connecting rod 1400 in sequence to hinge the second connecting rod 1400 to the armrest rod 1100.

[0057] The second end of the second connecting rod 1400 and the first end of the backrest rod 100 are also provided with matching through holes, and the fourth pin shaft passes through the second end of the second connecting rod 1400 and the first end of the backrest rod 100 in sequence to hinge the second connecting rod 1400 with the backrest rod 100.

[0058] Please continue to refer to Figure 1(a)-Figure 1(d) In a possible implementation, the second end of the handrail 1100 of this embodiment is further provided with a remote control installation portion 1120, and the remote control device 2000 is detachably connected in the remote control installation portion 1120. The remote control device 2000 can be selectively installed on any handrail 1100, so that the specific installation position of the remote control device 2000 can be selected according to the dominant hand of the user.

[0059] Specifically, the remote control mounting portion 1120 is arranged on the end surface of the armrest rod 1100 away from the backrest rod 100. The remote control mounting portion 1120 can be, for example, a structure such as a slot or a groove, and the corresponding remote control device 2000 can be provided with a buckle or a protrusion to achieve the installation of the remote control device 2000.

[0060] As shown in FIG. 1( d ), after the wheelchair of this embodiment is folded, the sum of the lengths of the armrest rod 1100 and the remote control device 2000 in the first direction X is less than the length of the backrest rod 100 , that is, the armrest rod 1100 and the remote control device 2000 are completely within the length range of the backrest rod 100 , thereby facilitating the reduction of the volume of the wheelchair after folding.

[0061] From the above description, it can be known that in this embodiment, the first connecting rod 1200 is hingedly arranged between the armrest rod 1100 and the backrest rod 100. When the armrest rod 1100 is folded, the first connecting rod 1200 first drives the armrest rod 1100 to rotate toward the side of the seat rod, and then the armrest rod 1100 rotates toward the side of the first connecting rod 1200. After folding, the armrest rod 1100, the first connecting rod 1200 and the backrest rod 100 are substantially parallel; the first connecting rod 1200 drives the armrest rod 1100 to rotate, thereby increasing the overlapping size of the armrest rod 1100 and the backrest rod 100, so that the armrest rod 1100 is not easy to exceed the range of the backrest rod 100 after being folded, which is beneficial to reducing the volume of the wheelchair after folding.

[0062] Figure 2(a)-Figure 2(d) This is a schematic diagram of the structure of a wheelchair frame in different states provided by an embodiment of the present application. Figure 2(a)-Figure 2(d) The wheelchair frame of this embodiment includes a backrest rod 100, a seat rod 200, a front support rod 300 and a rear support rod 400. The first end of the seat rod 200 is hinged to the backrest rod 100, the second end of the seat rod 200 is hinged to the first end of the front support rod 300, the second end of the front support rod 300 is used to connect the front wheel 500, the first end of the rear support rod 400 is hinged to the first end of the backrest rod 100, and the second end of the rear support rod 400 is used to connect the rear wheel 600.

[0063] Specifically, the seat rod 200 includes a seat rod body 210 and a seat rod connecting section 220. The seat rod connecting section 220 is arranged obliquely to the seat rod body 210, and the two generally form an "L" shape. In the unfolded state, the seat rod connecting section 220 is located at the first end of the seat rod body 210 and is arranged away from the rear support rod 400. The end of the seat rod connecting section 220 away from the seat rod body 210 is hinged to the middle part of the backrest rod body 110.

[0064] The front support bar 300 includes a front support bar body 310 and a front support bar connecting section 320. The front support bar connecting section 320 is arranged obliquely to the front support bar body 310. The structure of the front support bar body 310 can be arranged based on the installation requirements of the front wheel 500. In the unfolded state, the front support bar connecting section 320 is located at the first end of the front support bar body 310 and is arranged toward one side of the seat bar 200. The front support bar 300 is hinged to the second end of the seat bar body 210 through the front support bar connecting section 320.

[0065] The rear support rod 400 includes a rear support rod body 410 and a rear support rod connecting section 420. The rear support rod connecting section 420 is arranged obliquely to the rear support rod body 410, and the two generally form an "L" shape. In the unfolded state, the backrest rod connecting section 120 is located at the first end of the backrest rod body 110 and is arranged toward the side of the seat rod 200, and the rear support rod connecting section 420 is located at the first end of the rear support rod body 410 and is arranged toward the side of the seat rod 200. The end of the rear support rod connecting section 420 away from the rear support rod body 410 is hinged to the end of the backrest rod connecting section 120 away from the backrest rod body 110.

[0066] The wheelchair frame also includes a connecting rod 700 and a main support rod 800. A protrusion 430 is also provided on the rear support rod body 410. The first end of the connecting rod 700 is hinged to the protrusion 430, and the second end of the connecting rod 700 is hinged to the second end of the seat rod 200. The specific hinge structure of the connecting rod 700, the protrusion 430 and the seat rod 200 can be set as required. The first end of the main support rod 800 is hinged to the first end of the backrest rod body 110, and the second end of the main support rod 800 is hinged to the middle part of the front support rod body 310. The specific hinge structure of the main support rod 800, the backrest rod body 110 and the front support rod body 310 can be set as required. The backrest rod 100, the seat rod 200, the connecting rod 700 and the rear support rod 400 of this embodiment form a four-bar linkage; the backrest rod 100, the seat rod 200, the front support rod 300 and the main support rod 800 form another four-bar linkage.

[0067] As shown in FIG. 2( a ), in the unfolded state, the seat rod 200 of this embodiment is arranged substantially horizontally (along the first direction X), the backrest rod 100, the front support rod 300 and the rear support rod 400 are all inclined to the seat rod 200, and the backrest rod 100, the front support rod 300 and the rear support rod 400 are respectively located on both sides of the seat rod 200 along the second direction Y. In the unfolded state, each hinge is in a locked state under the action of the locking mechanism, and the user can push the backrest rod 100 or move the front wheel 500 and the rear wheel 600 along the first direction X through the driving device installed on the wheelchair frame, thereby realizing forward or backward movement.

[0068] When the wheelchair frame of this embodiment is converted from the unfolded state to the folded state, it can be folded in just one step. Figure 2(b) and 2(c)As shown, the locking mechanism can be unlocked so that all hinge points are in the unlocked state, and the backrest rod 100 is folded toward the second end of the seat rod 200 around the hinge point between the backrest rod body 110 and the seat rod connecting section 220, so that the first end of the backrest rod body 110 drives the backrest rod connecting section 120, the rear support rod connecting section 420, the main support rod 800 and the front support rod body 310 to move along the first direction X toward the side away from the seat rod 200; based on the principle of the four-bar structure, the backrest rod connecting section 120, the rear support rod connecting section 420, the main support rod 800 and the front support rod body 310 are 20. The movement of the main support rod 800 and the front support rod body 310 will simultaneously drive the rear support rod body 410 to fold toward the second end of the seat rod 200 around the hinge point between the protrusion 430 and the connecting rod 700, and the front support rod body 310 to fold toward the first end of the seat rod 200 around the hinge point between the front support rod body 310 and the main support rod 800, so that the backrest rod 100, the front support rod 300 and the front wheel 500, and the rear support rod 400 and the rear wheel 600 can be stored together in one step, and finally present the state shown in Figure 2 (d).

[0069] The wheelchair frame of this embodiment can be folded in one step, thereby further simplifying the folding process of the wheelchair frame, improving the folding efficiency, and facilitating the use of the user.

[0070] As shown in FIG. 2( d ), after folding, the front support rod 300 and the rear support rod 400 of this embodiment cross each other, so that the front support rod 300 and the front wheel 500 are close to the first end of the seat rod 200 in the first direction X, and the rear support rod 400 and the rear wheel 600 are close to the second end of the seat rod 200 in the first direction X. In the folded state, the length of the backrest rod 100 along the first direction X, the length of the seat rod 200 along the first direction X, the length of the front support rod 300 and the front wheel 500 along the first direction X, and the length of the rear support rod 400 and the rear wheel 600 along the first direction X are substantially equal, for example, the error range may be within ±100 mm. Preferably, in a plane perpendicular to the second direction Y, the front support rod 300, the front wheel 500, the rear support rod 400 and the rear wheel 600 are all located within the projection range of the seat rod 200, so as to ensure a smaller volume after folding.

[0071] In the second direction Y, the distance between the second end of the front support rod 300 and the first end of the seat rod 200 is preferably .

[0072] Furthermore, in the above embodiment, two backrest rods 100, seat rods 200, front support rods 300, rear support rods 400, connecting rods 700 and main support rods 800 are each provided. The two backrest rods 100, seat rods 200, front support rods 300, rear support rods 400, connecting rods 700 and main support rods 800 are respectively located on the left and right sides of the wheelchair frame, and correspond one to one along the third direction Z.

[0073] Optionally, the first end of the seat rod body 210 of the present embodiment can be fixedly connected to the seat rod connecting section 220 by fasteners such as screws, and the end of the seat rod connecting section 220 facing away from the seat rod body 210 is connected to the inner side of the backrest rod 100, that is, the two seat rod connecting sections 220 are located between the two backrest rods 100, which is beneficial to protect the hinge structure of the seat rod 200 and the backrest rod 100 from being easily damaged.

[0074] The two rear support rods 400 are also located between the two backrest rods 100 , which is helpful to protect the hinge structure between the rear support rods 400 and the backrest rods 100 from being damaged.

[0075] The end of the front support rod connecting section 320 facing away from the front support rod main body 310 can be provided with a mounting groove, and the two ends of the seat rod main body 210 are inserted into the mounting groove, and then the front support rod connecting section 320 and the seat rod main body 210 are hinged by using parts such as pins. The two front support rod main bodies 310 can be connected as a whole by a connecting rod, and both front support rod connecting sections 320 can be arranged on the connecting rod, which is beneficial to protect the hinge structure of the seat rod 200 and the front support rod 300 from being easily damaged.

[0076] The second ends of the two main support rods 800 are located between the two front support rods 300, so as to help protect the hinge structure between the main support rods 800 and the front support rods 300 from being easily damaged.

[0077] The connecting rod 700 is hinged to the pin connecting the front support rod connecting section 320 and the seat rod body 210, and the two connecting rods 700 are located between the two seat rods 200, which is beneficial to protect the hinge structure of the connecting rod 700 and the seat rod 200 from being easily damaged.

[0078] The two backrest rods 100 are located between the first ends of the two main support rods 800 , and the maximum width of the entire seat frame in the third direction Z is the distance between the two front support rod bodies 310 .

[0079] Furthermore, in order to facilitate the placement of the user's feet and improve the user's comfort when riding, this embodiment also provides a foot pedal 900 between the two front support rods 300, and the foot pedal 900 is hingedly connected to the two main support rods 800, so as to facilitate storage.

[0080] Specifically, the left and right sides of the footrest 900 are provided with connecting rod assemblies, and the two connecting rod assemblies are respectively hinged to the two main support rods 800. Optionally, the connecting rod assembly includes a first connecting rod 910 and a second connecting rod 920, the first end of the first connecting rod 910 is hinged to the middle of the main support rod 800, the second end of the first connecting rod 910 is hinged to the first end of the second connecting rod 920, and the second end of the second connecting rod 920 is hinged to the front support rod body 310 and the footrest 900. Please refer to Figure 2 (a) and Figure 2 (b). When the wheelchair frame is folded and stored, the first end of the second connecting rod 920 and the second end of the first connecting rod 910 are folded and bent toward the inside of the wheelchair frame, so that the footrest 900 does not exceed the range of the front support rod 300 in the first direction X after being folded and stored, and the volume of the wheelchair frame after folding will not be increased due to the footrest 900.

[0081] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0082] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0083] It should be noted that in the description of this application, the terms "first" and "second" are only used to facilitate the description of different components, and cannot be understood as indicating or implying a sequential relationship, relative importance, or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features.

[0084] The various embodiments or implementation methods in the present application are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0085] In the description of the present application, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present application. In the present application, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0086] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An armrest assembly, used to be arranged on a wheelchair frame and hinged to a backrest rod, characterized in that: It comprises a handrail rod and a first connecting rod, wherein a first end of the first connecting rod is hinged to the backrest rod, and a second end of the first connecting rod is hinged to the first end of the handrail rod; The armrest assembly has a relative unfolded state and a folded state; in the unfolded state, the armrest rod is horizontally arranged, and the first end of the first connecting rod is located on the side of the armrest rod facing the seat rod; when the armrest assembly is converted from the unfolded state to the folded state, the first end of the first connecting rod rotates toward the side of the seat around the hinge point between the first connecting rod and the backrest rod, and the armrest rod rotates toward the side of the first connecting rod around the hinge point between the armrest rod and the first connecting rod.

2. The armrest assembly according to claim 1, characterized in that: A first mounting portion is provided at the middle of the backrest rod, and a first pin passes through the first end of the first connecting rod and the first mounting portion in sequence to hinge the first connecting rod to the backrest rod; The second pin shaft passes through the second end of the first connecting rod and the first end of the handrail rod in sequence to hinge the first connecting rod to the handrail rod.

3. The armrest assembly according to claim 1, characterized in that: The backrest rod is also provided with a limiting device, and in the unfolded state, the first connecting rod abuts against the limiting device.

4. The armrest assembly according to claim 3, characterized in that: The limiting device includes a first baffle and a second baffle, the first end of the first baffle is fixedly connected to the backrest rod, the second end of the first baffle is fixedly connected to the first end of the second baffle, and the first baffle, the second baffle and the backrest rod jointly define a limiting groove for accommodating the first connecting rod.

5. The armrest assembly according to claim 4, characterized in that: The second baffle is perpendicular to the first baffle; the first baffle and the second baffle are formed in one piece.

6. The armrest assembly according to claim 3, characterized in that: It also includes a second connecting rod, a first end of the second connecting rod is hinged to the second end of the armrest rod, and the second end of the second connecting rod is hinged to the first end of the backrest rod; when the armrest assembly is converted from the unfolded state to the folded state, the second connecting rod rotates toward one side of the backrest rod around the hinge point between the second connecting rod and the backrest rod.

7. The armrest assembly according to claim 6, characterized in that: A second mounting portion is provided at the second end of the handrail rod, and a third pin shaft passes through the second end of the handrail rod and the first end of the second connecting rod in sequence to hinge the second connecting rod to the handrail rod; The fourth pin shaft passes through the second end of the second connecting rod and the first end of the backrest rod in sequence to hinge the second connecting rod to the backrest rod.

8. The armrest assembly according to claim 1, characterized in that: The second end of the handrail is also provided with a remote control installation portion, and the remote control device is detachably connected in the remote control installation portion.

9. A wheelchair frame, characterized in that: The wheelchair frame further comprises a backrest rod, a seat rod, a front support rod and a rear support rod; the first end of the seat rod is hinged to the backrest rod, the second end of the seat rod is hinged to the first end of the front support rod, the second end of the front support rod is used to connect the front wheel, the first end of the rear support rod is hinged to the first end of the backrest rod, and the second end of the rear support rod is used to connect the rear wheel; The wheelchair frame has a relative unfolded state and a folded state. In the unfolded state, the seat rod is horizontally arranged, the backrest rod, the front support rod and the rear support rod are all inclined to the seat rod, and the backrest rod and the front support rod and the rear support rod are respectively located on both sides of the seat rod; when the wheelchair frame is converted from the unfolded state to the folded state, the backrest rod is folded toward the second end of the seat rod around the hinge point between the backrest rod and the seat rod; the rear support rod and the rear wheel are folded toward the second end of the seat rod around the hinge point between the rear support rod and the backrest rod; the front support rod and the front wheel are folded toward the first end of the seat rod around the hinge point between the front support rod and the seat rod.

10. A wheelchair, characterized in that: Comprising the wheelchair frame as claimed in claim 9.

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